JPH01102767A - Door opening mechanism for front loading mechanism - Google Patents

Abstract

PURPOSE:To facilitate the insertion of a cassette by regulating a door supported pivotally at the lower part of a cassette throw-in opening and turned by 90 deg. outward at the unloading position of a cassette holder as an opening position by using a lever, a spring, and a cam. CONSTITUTION:A front door 6 which turns by 90 deg. outward is mounted at the cassette throw-in opening 11 so that is can be turned facing this side downward, and also, it is pressed by a first spring 63 in a closing direction. An unloading operation is performed by rotating a first lever 2 in a clockwise direction from a loading completing state, and moving the cassette holder 5 in an unloading direction. A second lever 3 is rotated in a counterclockwise direction by the cam 23 of the first lever 2, and half-opens the door 6 against the first spring 63. And is case of loading the cassette 7 while the door 6 opened by an ejected cassette is opened, the cassette 7 is selected to loading completing position. In such a way, it is possible to easily insert the cassette.

Description

DETAILED DESCRIPTION OF THE INVENTION (C) Industrial Application Field The present invention relates to a door opening mechanism for a front loading mechanism.

(b) Conventional technology The front loading mechanism of a videotape recorder normally loads a cassette by inserting the cassette into the cassette slot, which requires an operation to fit the cassette into the slot. there were.

Therefore, Japanese Patent Application Laid-Open No. 61-276159 (GIIB
15/665> adopts a configuration in which the cassette holder is pulled out to the outside of the cabinet, and cassette loading is achieved by loading the cassette into the pulled-out cassette holder. (c) Problems to be Solved by the Invention However, in the above-mentioned prior art, the cassette holder must be pulled out a considerable length to allow the cassette to be placed, and it takes time until the cassette holder is completely pulled out. However, the cassette holder must be able to be supported within the cabinet in the pulled out state, making the entire cassette holder large.

(d) Means for Solving the Problems Therefore, the present invention provides a first lever for moving the cassette holder, a door pivotally supported at the bottom of the cassette slot and rotating outward by 90 degrees;
A spring that rotationally biases the door in the closing direction, a second lever that engages one end with the layer, and a second lever that rotates together with the first lever and applies the other end of the second lever to the outer periphery by the biasing force of the spring. It is characterized in that a cam is provided for defining said layer in an open position in the unloading position of the abutting cassette holder.

(e) According to the present invention, the door is horizontally defined outward from the lower edge of the cassette slot in the unloading state.

Example) Figure 1 shows the state in which the door (6) of the loading device is open,
FIG. 2 shows a state in the middle of loading, and when the cassette bolter (5) is empty, it waits in this state. FIG. 3 shows a state in which loading is completed, and FIG. 4 shows a state in which the door (6) is manually closed from the first state.

In FIGS. 1 to 4, the diagonal line on the first lever (2) is not a line representing a cross section, but the first lever (2) as described later.

It shows the shape of the cam (23) formed on the back side of the bar, and the diagonal lines on the second lever (3) are added to make the shape of the second lever easier to understand.

As shown in Figure 1, the front panel (1
A cassette input port (11) is provided at the top of the cassette input port (11), and a Freon (Freon)-JSi (6) is attached to the input port so as to be rotatable downward toward the front and is biased in the closing direction by the first spring (63). There is.

5 (6) has end plates (60) protruding from both ends, as shown in FIG. Adjust the opening angle of the door to 90°.
It has a contact surface (61) that restricts the cassette holder (5) and an arcuate pressing portion (66) that presses the cassette holder (5>) inward as described later.

Furthermore, an opening/closing shaft (65) that engages with a rotation support shaft (64) of the door and an auxiliary lever (4) to be described later to open and close the door 5 (6) is provided on the end plate (60).

A loading device is provided inside the front panel (1), and the loading device has a pair of side plates (13) protruding from both sides of the chassis (12), and a cassette holder (5) is provided between the side plates (13). Then, the short shafts (51) (52) protruding from the holder (5) are slidably fitted into the abbreviated guide grooves (14) (14) formed in two diameters on each side plate (13). There is.

The holder (5) retracts substantially horizontally along the guide slots (14) (14) and changes direction downward at the bend of the slot.

The holder (5) is attached to the door (6) by a third spring (not shown).
When the holder is biased toward the door and the holder is located on the door side, the height of the bottom of the holder (5) is equal to the inner surface (6) of the door (6) in the open state.
2) are aligned with the height.

A lever device t (20) consisting of a first lever (2) and a second lever (3) is installed at the lower part of the substantially central portion of both side plates (13).
is in place.

A sector gear (22) is formed on the first lever (2) concentrically with the rotation center of the lever, and this gear is connected to an intermediate gear (30).
) is connected to a drive gear (35).

A gear shaft (36) of a drive gear (35) is linked to a loading motor (none of which is shown) via a transmission means. The loading motor will automatically stop when overloaded.

The tip of the first lever (2) and the door of the cassette holder (5) (
The short shaft (51) on the 6) side is pivotally connected by a link plate (27).

- A second lever (3) is rotatably supported on the pivot shaft (34) of the intermediate gear (30) on the side, independently of the rotation of the gear, and the pivot shaft (34) is connected to the pivot shaft (34) of the second intermediate gear (30). It passes through the middle part. An auxiliary lever (4) is pivotally supported at one end of the second lever on the door side so as to be rotatable in a vertical plane.

As shown in Figures 7 and 8, the auxiliary lever (4) is constantly urged counterclockwise by the second spring (43) and is in contact with the stopper (33) provided on the second lever (3). The auxiliary lever (4) and the second lever (3) rotate together.

As shown in Figures 1 to 2 or 3, the auxiliary lever (4)
A guide groove (41) is provided in the guide groove <41>.
The opening/closing shaft (65) of the door (6) is slidably fitted into the opening/closing shaft (65).

The tip of the guide groove (41) is open, and a lock portion (9) that can be engaged with the opening/closing shaft (65) of the door (6) in the closed state is formed at the open end.

When the auxiliary lever (4) and the second lever (3) rotate together clockwise, the opening/closing shaft (65) is guided by the groove (41).
A downward force acts on the door (6) and the door (6) closes.

The other end side of the second lever (3) is connected to the cam (
23), the first abutting part (31) and the second abutting part (3
2) is formed.

The cam (23) engages with a pressing peak surface (24) that presses the first contact portion (31), a relief valley surface (25) that releases the first contact portion (31), and a second contact portion (32). This forms a hook portion (26) that prevents the first lever (2) from rotating counterclockwise.

As shown in Figure 1, the first contact part (31> of the second lever (3>)
is in contact with the pressing crest (24) of the cam (23), the second lever (3) is prevented from rotating clockwise, and the auxiliary lever (4) on the second lever (3) is in contact with the door ( The door (6) is held open by lifting the opening/closing shaft (65) of the door (6) upward against the first high bell 3) which urges the door (6) in the closing direction.

As shown in Fig. 2, the first lever (2) rotates counterclockwise, and the suppression crest (24) of the first lever (2) is rotated counterclockwise.
3) when it comes off the first contact part (31), the first penetration (
63) closes the door (6), and the opening/closing shaft (6) of the door (6)
The auxiliary lever (4) and the second lever (
3) clockwise so that the first abutting part (31) of the second lever (3) corresponds to the relief valley surface (25) of the cam (23), and the second abutting part of the second lever (3) <32) is the cam (
23) engages with the hook (26).

There is a cassette holder (5) inside the front panel (1).
A sensor for detecting the presence or absence of the upper cassette (7) is made bendable, and a loader start switch <81) is provided on one of the pair of side plates (13) that support the holder (5).

The start switch (81) is operated by a protrusion (28) on a link plate (27) that pivotally connects the first lever (2) and the force press holder (5).

Next, loading and unloading when the magnetic recording/reproducing device is normally energized will be described.

As shown in Figure 2, when the oven button (not shown) on the front panel is operated with the door (6) closed and the holder (5) in the standby position, the loading motor will rotate. , the first lever (2) rotates clockwise via the drive gear (35) and the intermediate gear (30), and the link plate (27)
Press the cassette holder (5) toward the door (6) via the cassette holder (5).

By rotating the first lever (2) clockwise,
As shown in Fig. 1, the pressing crest (24) of the cam (23) of the first lever (2) presses the first abutting portion (31>) of the second lever (3), thereby pushing the second lever (3). Rotate counterclockwise.

The auxiliary lever (4) on the second lever (3) also rotates counterclockwise relative to the second lever (3) and lifts the opening/closing shaft (65) of the door (6). open.

The protrusion (28) on the link plate (27) connecting the auxiliary lever (4) and the cassette holder (5) turns off the start switch and stops the low-day mode (Fig. 1).

Next, slide the inner surface (62) of ff1 (6) and slide the cassette (
7) and wait at the same height as the inner surface of the holder (5).
) and place the cassette (7) on it.

When the loading of the cassette (7) is detected by the sensor (8) and the close button provided on the front panel is operated, the loading motor rotates in the opposite direction to that described above, and the first lever (2) rotates counterclockwise. and remove the cassette holder (
5) Move in the loading direction.

When the first lever (2) rotates counterclockwise, the pressing crest (24) of the cam (23) of the first lever (2)
Since the fi (6) comes off the first abutting part (31> of the second lever (3), the fi (6) tries to close due to the biasing force of the first spring (63), but the cassette (7) ) is on the door (6), so the second lever (3) does not rotate and maintains the state shown in Figure 1, and only the second lever (2) rotates. When the cassette (7) comes off the door (6) and enters the slot (11), the first spring (65) closes the door (6), and the second lever (3) is moved clockwise with a delay. When the second lever (3) rotates, the first lever (2) is rotated so that the engaging part (26) of the cam (23) is rotated to the second position of the second lever (3).
The first lever (2) has rotated to a position where it does not engage with the abutting part (32), and the first lever (2) has rotated counterclockwise without any problem.
As shown in the figure, place the cassette holder (5) at the loading completion position.
) and the cassette (7) can be moved.

When loading is completed, the motor is automatically stopped by a loading completion detection switch provided at an appropriate location or by a load acting on the loading motor at the loading completion position.

Unloading operation The first lever (2) rotates clockwise from the loading completion state shown in FIG. 3, and the cassette holder (5) moves in the unloading direction.

The second lever (3) is rotated counterclockwise by the cam (23) of the first lever (2), and the auxiliary lever (4) on the second lever (3) is also rotated counterclockwise to open the door. Lift the opening/closing shaft (65) of the door (6>) against the first spring (63).
) is left half open.

This is because the second spring (43) that biases the auxiliary lever (4) in a counterclockwise direction relative to the second lever (3) is attached to the door (
6) in the closing direction, the auxiliary lever (4) rotates counterclockwise together with the second lever (3) against the first spring (63). This is to do so.

The door (6) is forcibly opened by the cassette (7) which is ejected when the door (6) is in the half-open state.

As shown in Figure 1, unloading is completed and the cassette (
7) is taken out, the timer sets Jn(
6) is held open, while the next cassette (7) is held open.
), the loading motor rotates, the first lever (2) rotates counterclockwise, and the pressing crest (24) of the lever presses against the first contact portion (31) of the second lever (3). )
The second lever (3) is allowed to rotate clockwise.

5 (6) is closed by the biasing force of the first spring (65).

5 (6) closes, the opening/closing shaft (65
) is engaged with the auxiliary lever (4) receives a clockwise force,
The auxiliary lever (4) rotates clockwise together with the second lever (3), and the second contact part (32) of the second lever (3) engages with the hook part (26) of the first lever (2>). As a result, the first lever (2) is prevented from rotating counterclockwise, an overload is applied to the loading motor, and the loading motor is stopped.

The above state is the standby state of the holder (5) mentioned first. In this way, since the loading device can be stopped at an intermediate position before reaching the loading completion state shown in FIG. 3, the operating time of the loading device for loading the next cassette can be shortened.

In addition, while the door (6) in Figure 1 is open, the cassette (7)
When the cassette (7) is loaded, the cassette (7) is carried to the loading completion position as described above.

Next, the operation of the loading device when manually passing through the door (6) will be described with respect to the case where the magnetic recording/reproducing device is energized and the case where the energization is cut off.

Filter 1ji L When door 6) in Figure 1 is open, turn a(6) in the closing direction (counterclockwise in the drawing), M(6)
The pressing portion (66) presses the short shaft (51) of the cassette holder (5) on the door (6) side, causing the cassette (7) to move backward.

As a result, the link plate (27) connecting the cassette (7) and the first lever (2) also retreats, and the loader start switch (81) is turned on to carry out the normal loading operation and perform the song recording. Like, cassette holder (5),
The first and second levers (2), (3) and the auxiliary lever (4) are stopped at the standby position shown in FIG.

East 11 Standing 1 When the door (6) in Figure 1 is rotated in the closing direction from the open state, the opening/closing shaft (65) of the door (6) will move the auxiliary lever (4) and the second lever. (3) Apply a force to rotate clockwise.

The second lever (3) hits the pressing surface (24) of the cam (23) of the $ lever (2) and is prevented from rotating clockwise, and only the auxiliary lever (4) is on the second lever (3). Rotate clockwise.

<-(4) is only the second spring (43) on the second lever (3) that is biased in the counterclockwise direction, so the second The auxiliary lever (4) rotates clockwise without forcing the lever (3), and there is no problem in closing the door (6) (Fig. 4).

In addition, when the TP (6) is closed, the opening/closing shaft (65) of the door (6) engages the lock portion (9) formed on the auxiliary lever (4).
The door (6) and the auxiliary lever (4), which are engaged with each other and are in the latch state, are pushed against each other to maintain the closed state of the door (6).

As the door (6) rotates, the pressing part (66) presses the short shaft (52) to slightly move the link plate (27), as in the case of energization, and the loading start switch (81)
However, when the door (6) is closed, the short shaft (52) and the pressing portion (66) are disengaged and the loading start switch (81) also returns to its original state.

As shown in Figure 4, when the door (6) is closed and the source switch is operated manually, the loading motor is activated.
The first lever (2) rotates in the loading direction, and following this rotation, the second lever (3) of the chain 2 rotates clockwise. As a result, the opening/closing shaft (65) of the door (6) is
> is removed from the lock portion (9) and fitted into the guide groove (41), and the closed state of the lock 5 (6) is released.

First lever (2), second lever (3), auxiliary lever (4)
) stops in the standby state shown in FIG.

The system control circuit for executing the above-mentioned operations will be described below with reference to the circuit diagram of FIG. 9 and the flowchart of FIG. 10. First, the microcomputer (94) that executes the system operation operates an oven switch (OF) that is closed by operating the ovens and closes.
In addition to the output of the close switch (CL), the output of the loading start switch (81), and the mode detection means (which detects the mode by detecting the rotational position of the first lever (2)).
90), and further input the output of a cassette detection means (71) consisting of a photocoupler for detecting the attachment of a cassette through a notch provided in the cassette holder (5) at the unloading position 11'. ing. Further, the microcomputer (94) forms and derives a control output for the loading motor (92), and detects an overload on the loading motor (92) using a load detection means (91).

Therefore, first, when the power is turned on, the reset means (93) resets the microcomputer (94). Next, the mode is determined by detecting the output of the mode detection means (90).

As a result of mode determination, if it is determined that it is in standby mode,
Oven switch (OF) depending on oven operation
is closed, and the loading motor (92) is reversed to enter the unloading mode. This unloading mode ends when the load detection means (9) generates an output, and the door (6) is opened to realize the unloading mode (FIG. 1) in which the cassette can be loaded.

Furthermore, if it is determined that the mode is unloading mode as a result of the mode determination, it is determined that the cassette is not installed based on the output of the cassette detection means (71), and the loading start switch (81) is activated. It is determined that the close switch (CL) is not activated by the operation of the close type, and it is determined that the time limit means (95) in the microcomputer (94) is not counting 20 seconds. , The above four types of discrimination are repeated continuously, so whether the closing type can be operated or not,
When the door (6) is closed or m(6) remains open for 20 seconds, the loading motor (92) rotates normally. This normal rotation ends when the second abutment part (32) and the catch part (26) engage and an output from the unload detection means (91) is generated.

However, when it is determined that the cassette is installed, the cassette is pushed in, the loading start switch (81) is activated, and the unloading mode F is maintained until the closing switch is operated. When the loading start switch (81) is actuated or the close switch is operated, the close switch (CL) is closed, the rope tong motor (92) is caused to rotate forward, and the cassette holder (5) is moved to the cassette (7).
With this, the cassette is moved to the loading position. When the cassette holder (5) reaches the loading position, the loading motor (92) stops rotating, the load detection means (91) outputs an output, the loading motor (92) stops rotating, and the loading mode is realized. be done.

Further, when the loading mode is determined as a result of mode determination, the loading mode is connected until the oven button is operated. When the oven button is operated and the open switch (OP) is activated, Low Day> Gmoke (92)
is reversed and enters unloading mode. The driving of the loading motor (92) is stopped based on the output generated by the load detection means (91).

In the unloading mode in which the cassette (7) is ejected, the extraction of the cassette (7) is determined and the operation of the close button is determined. When the close button is operated, the loading mode is entered, and when the cassette is extracted, the It goes into unloading mode without a cassette.

In the embodiment described above, overload of the loading motor is detected by mechanically locking each position of the cassette boulder (5), and setting of each mode is realized. It goes without saying that instead of providing the first lever (2), the rotational position of the first lever (2) may be detected by the mode detection means (90).

Furthermore, the lock part (9) for locking the door (6) is not limited to being formed in the auxiliary lever (4) as described above, but may be formed in a notch part formed in the end plate (60) of the door (6), for example. (67)
The front short shaft (51) of the holder (5) may be engaged with the short shaft (51) of the holder (5).

It goes without saying that the present invention is not limited to the configuration of the above-described embodiments, and that various modifications can be made within the scope of the claims.

(G) Effects of the Invention According to the present invention, when inserting a cassette, the horizontally defined upper surface of the door serves as a guide for inserting the cassette, making it easier to insert the cassette, which is highly effective.

[Brief explanation of the drawing]

Figure 1 is a side view of the loading jig device in the ejected state.
Figure 2 is a side view of the loading device with the door closed;
Figure 3 is a cross-sectional view of the loading device in a state where loading is completed, Figure 4 is a side view of the loading device with the door manually closed when power is cut off, Figure 5 is a plan view of the loading device, and Figure 6 is the door. Figure 7 is a side view showing how the second lever and auxiliary lever are installed, Figure 8 is a plan view of the same, Figure 9 is a mode setting circuit diagram, Figure 10 is the operation of Figure 9. It is an explanatory diagram. (2)...First lever (23)...Cam (3)
...Second lever (63)...Spring (6)...
door

Claims (1)

[Claims] (1) a first lever that is rotated by a loading motor and guides the cassette holder between an unloading position and a loading position along an L-shaped guide formed on two side plates; 9 outwards from the closed position
a door that is displaced between an open position rotated by 0°, a spring that biases the door to rotate in a closing direction, and a second lever that has one end engaged with the door and is rotatably supported on the side plate. and bringing the other end of the second lever, which rotates together with the first lever and is rotationally biased by the spring into contact with its outer periphery, to define the door in the open position when the cassette holder is in the unloading position. Front-loading door opening mechanism consisting of cams arranged respectively.